Furnace



A. SMALLWOOD.

FURNACE.

APPLICATION HLED JULY 31.1918.

Patented Mar. 30,

5 SHEETS-SHUT Z.

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, A. SMALLWOOD.

FURNACE.

1,335,204. Patented Mar- 30, 1920.

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A. SMALLWOOD.

FURNACE.

APPLICATION mu) JULY 31, 1918 1,335,204.

Patented Mar. 30, 1920.

5 SHEETS-$HEET 5- J 4 x W2 m m XMWN Ll a w m wv Wi icy nnrrnn STATES PATENT OFFICE.

V ALFRED SMALLWOOD, or LONDON, ENGLAND.

FURNACE.

Specification of Letters Patent. Patented 313,1, 30, 1920.

Application filed July 31, 1918. Serial No. 247,644.

; being afterward passed into longitudinal flues advantageously in the side walls of the furnace, which flues communicate by ports with the goods chamber at intervals along the length thereof, 'said'ports being located in relation to other ports which admit the heating gases. The ports for admitting the air and heati'ng gases may be individually regulable.

in order that this invention may be clearly understood and readily; carried into practice, reference may be had to the appended explanatory sheets of drawings, upon which Figure 1 is a sectional sideelevation of a furnace according to the present invention, the plane of section being on line 12 of Fig. 2.

Fig. 2 is a sectional end elevation of the furnace shown in Fig. 1.

Fig. 3 is a sectional plan of the furnace shown in Figs. 1 and 2, the plane of section being on line 34: of the figure last mentioned.

Fig. i is a sectional plan of the furnace shown in Figs. 1 and 2, the plane of section being on line 5.6 of the figure last mentioned.

Fig. 5 is a section on the line 7-8 of Fig. 3.

in a convenient embodiment of the present invention, the goods are adapted to be supported upon a truck a within the body of which two longitudinal combustion chambers b are provided to the center extending substantially the full length of the truck l'I-OC y. into the extremity of these combustion chambers, Bunsen burners c are adaptedto project. The other extremities of the combustion chambers communicate by way of laterally extending passages 65 with heat flues 6 also extending throughout a substantial part of the length of the furnace so that the gases are enabled to flow in a reverse direction along the heat flues, said heat flues occurring one on each side of the truck body. From these heat flues at intervals along their length, latera1 ports f extendwhich communicate with the goods chamber g, which lateral ports may be individually regulablev by dampers h.. In the vicinity of these ports secondary heated air is adapted to be admitted. Said secondary air is admitted by way of ports 2' located at intervals along the length ofthe furnace, said ports extending from longitudinal hot air flues. j in the side walls of the furnace.

Saidports i may be individually regulable, as for instance by dampers 2' The second ary air before passing into saidfiues in the side walls of the furnace is adapted to pass through arecuperatorsystem in the roof of the furnace. In one arrangement five longitudinal flues- 7c are provided through which the waste gases are adapted to pass, these flues being spaced at intervals across the width of the furnace. The gases from the goods chamber 9 egress by way of a flue Z 'which communicates with a jacket space at. zit the other end of the furnace this jacket space an is in communication with the flues k by openings 11. At the front end of the furnace the flues k communicate by openings 0 with the stack 10. On each side of the up er part of the furnace and in the horizontal plane of the flues is an air flue g is provided which extends three times the length of the furnace in 8 form and afterward extends downwardly at r to the longitudinal air flue j in the side wall of the furnace which communicates by the ports 11 with the goods chamber in the vicinity of the ports 7 by which the primarily ignited fuel issues. The air may enter the flue by an opening 3 in the side wall of the mace, which opening 8 offers admission for atmospheric air to an upwardly extending flue t which communicates with a transverse flue u leading to the flue g.

Primary air may be admitted in the vicinity of the burner from a broad shallow fine '2) located-in the truck body below the combustion chamber and heat flue. The air is adapted to enter this flue at w and at the opposite end of the furnace said flue 4) communicates by an upward flue m with a port which admits to the combustion chamber What I claim as my invention and desire to secure by Letters Patent is: a

1. In' a furnace, in" combination with a combustion chamber and a goods chamber interconnected by a series of ports, means for introducing air into said combustion chamber to eifectpartial combustion of the fuel gases, a recuperating system located in the crown or roof of the furnace, hot air fi ues, air ducts in said system communicating with said hot air flues, said flues extending horizontally substantially the length of the furnace side walls and being provided with distributed ports contiguous to said first named ports.

2; In a furnace, a carriage, longitudinal heat flues located in the carriage body, a

' goods chamber communicating with said heat flues by a series of ports, means for inducting air through said system to preheat anddistribute the air so as to effect complete combustion of the fuel gases.

3; In a furnace, a carriage, longitudinal combustion chambers in the carriage body, longitudinal hot air flues in said carriage body communicating with said combustion chambers, a goods chamber communicating with said hot air flues by a series of ports, means for introducing partially combusted fuel gases into said heat flues, a recuperating system,= and means for conducting air through said recuperating system and dis charging the air through a series of ports contiguous to said first named ports.

4. Ina furnace, a carriage, longitudinal combustion chambers in the carriage body, longitudinal hot air fiues in said carriage body communicating with said combustion chambers, a ,goods chamber communicating with said hot air flues by a series of ports,

combustion chambers in the carriage body,

longitudinal hot air flues in said carriage body communicatingwith said combustion chamber, a goods chamber communicating with said hot air flues by a series of individually regulable ports, means for introducing partially combusted fuel gases into said heat flues, a recuperating system, longitudinal heat flues in the furnace walls, and air ducts in said system communicating with said heat flues, said heat flues having a plurality of individually regulable' ports contiguous to said first named ports.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

ALFRED SMALLWOOD. 

